Oil burner



Oct. 15, 1940. W' J, ROSE ET AL 2,217,995

on. BURNER Filed June 24. 1939 sheets-sheet 1 Zraea Patented Oct. l5, 1940 iihiiTED STATES OIL BURNER Walter J. Rose, Newton, and Albert L. Paradi Cambridge, Mass.

Application June 24, 1939, Serial No. 281,016

2 Claims.

Our present invention relates to oil burners, and more particularly to gravity fed oil burners for use in heating plants where expensive automatic power driven apparatus is beyond the price range of many people who otherwise would pre fer to use oil for heating purposes.

It is a well known fact in the trade that the greatest diinculty encountered in the use of gravity operated oil burners lies in the fact that it is very difficult to prevent the formation of carbon in ne spray nozzles and the like over any appreciable time. With the formation of carbon in small openings the adjustment of the flow of oil is a difficult problem in order to keep such burner in proper operation.

In our present invention we have designed an apparatus making use of the inexpensive gravity feed which will operate indefinitely without encountering any difficulties due to carbon or other irregularities in the oil feed line.

The principal object of our invention is to provide an improved gravity fed oil burner;

Another object is to provide an oil burner1 which can be attached to the coal door of any furnace;

Still another object is to provide an improved oil burner which can be installed on any furnace without altering or damaging such furnace thereby making it possible for a tenant of rented property to make use of same without having it become attached to the property by law in the event such tenant wishes to change his residence, etc., and

Other objects and novel features comprising the construction and operation of our invention will be apparent as the description of the same progresses.

in the drawings illustrating our invention:

Fig. 1 is a fragmentary front elevation of a furnace with our invention attached;

Fig. 2 is a fragmentary side elevation of a furnace showing a side elevation of that portion of our apparatus which extends outside of the furnace door;

Fig. 3 is a fragmentary cross-section taken on the line 3--3 of Fig. 1, and

Fig. i is a vertical fragmentary cross-section taken on the line -ll of Fig. 3.

Referring more in detail to the drawings, iti indicates a conventional furnace the coal door of which has been removed.

Over the face of the furnace door we have attached a plate I l by means of screws i2 and have further provided a out out lower central portion bounded by the sides the topI at I4.

The main casting of the burner comprises a lower tray portion l5 which rests on the bottom ofthecoal door opening, as shown in Fig. 4, the rear portion extending back into the firebox region of the furnace. The front portion of the tray extends out through the furnacedoor and is provided with a hoodlike portion i6 which is provided with a channel portion I1 on the top and two sides into which 'the open edges I3 and I4 of the plate Il are tted. On the outer face of the hood end of the tray I5 we have provided hinges S8 on which is hung a door I9. The door I3 is provided with air ports 2D and a pivoted shutter ZI which is designed to adjust the air which may be admitted to the ports.

On the bottom of the hood portion I6 of the tray we have provided a post 22 the lower end of which may be imbedded in a concrete door or it may rest on top of` a floor. The post 22 is added for the purpose of stability but is not absolutely essential to the operation of the apparatus.

Adjacent the post 22 and depending from the bottom of the tray l 5 we have provided a bracket 23 and a set screw 24. Inside of the furnace and also depending from the bottom of the tray I5 we have provided a bracket 25 and 'a long set screw 26. A slideway 2'1 is provided in the cen-- trai bottom portion of the tray I5 in which is slidably engaged another bracket 28. When the apparatus is set up in the furnace the set screw 26 moves the bracket 28 against the inner wall of the fire box and the set screw 24 is adjusted both screws being tightened up to make the apparatus rigid in the furnace. The bracket 25 may be made of sufficient length to extend down and rest on the furnace grate if desired.

On the back end of the tray I5 we have provided a horizontal extension piece 29. When the apparatus is completely adjusted in the furnace of the opening at I3and the space below and up around the sides of the tray I5 is lled with packed sand, as indicated in Fig. 4, and a top layer of cement 30 is applied firmly imbedding the tray in place. The hori- Zontal extension portion 29 under the sand and cement acts to prevent the rearend of the tray from lifting up or working out of place.

Resting in the tray I5 are the fire units 3| and 32 being preferably strapped together at 33. In the outer front sides ofthe units 3l and 32 are tapped openings adapted to receive sleeves 3Ia and 32a through which are led the oil pipes or tubing 34 and 35 through which oil is admitted to the units 3| and 32.

Eso

The oil is fed to the burner from a conventional oil control apparatus indicated at through control valve knobs 36 and 31. This apparatus does not comprise a part of our invention therefore is not described in detail being a standard piece of apparatus in the trade. Oil is maintained in this apparatus at the level indicated at 38 which corresponds with the level shown in Fig. 4.

When the apparatus in the furnace is in operation and generating gas the level 38 shown drops down so that there is just a film at the bottom diminishing to the rear.

As the air draws through the openings 20 over the units 3l and 32 a whirling name develops in the round ends 3H)` and 32h producing a very hot and spreading flame. The air is regulated from the member 2| on the door.

Due to the fact that the oil inlet openings in the units 3| and 32 are not in the flame area and that they are large in comparison with other types of gravity burner nozzles, carbon does not accumulate in the opening to reduce the iiow of oil. Furthermore, the oil pipes 34 and 35 are large enough in diameter to prevent clogging by fine particles of foreign matter.

Under most conditions, it is possible to shut off one burner after bringing the apparatus to a point of proper operation and continue with one unit.

It will thus be seen that we have designed a very efficient gravity oil burner eliminating certain undesirable features common to this type of heating equipment. It is understood however that we may vary the size and proportion of the various parts within wide limits without departing from the spirit of the invention.

Having thus described our invention, what we claim as new is:

1. In combination with a heating furnace having a conventional fire chamber and fuel door frame, said door frame having a lower horizontal surface, an oil burner base member mounted on the lower horizontal surface of said door frame, the front portion of said base member extending out beyond the face of said fuel door frame, the said extension portion of said base outside of said door frame being closed across the top, bottom and two sides, lower brackets attached to the lower side of said base on the outside and the inside of said fire chamber of said furnace, adjustable means connecting with said brackets and engaged with the wall of said re chamber for the purp-ose of anchoring said base to said furnace, the rear portion of said base Within said fire chamber comprising an open pan, an inverted U shaped plate attached to the outside face of said door frame, parallely disposed guide members located across the top and up the two sides of said outer extension portion of said base member, the inner edges of said plate engaged between said guide members, a fire pan mounted in said base pan, an oil pipe extending from the outside of said furnace through one side of the front extended portion of said base member and communicating with the interior of said re pan, a door member hinged to the front face of said front extension portion of said base, and adjustable air inlet members located in said door.

2. In combination with a heating furnace having a conventional re chamber and fuel door frame and an oil burner having an outside door and extension door frame housing connecting through the said furnace door frame with an inner re chamber base pan, an inverted U shaped plate member attached to the face of the said fuel door frame of said furnace, parallely disposed guide members located around the rear portion of said extension door frame housing and engaged with the inside edges of said U shaped plate, the said channel comprising a continuous track across the top and down the two sides on the exterior of said extension door frame housing portion, an oil pan mounted in said base pan, and an oil pipe extending from the outside of said furnace through said extension portion and into said oil pan.

WALTER J. ROSE.

ALBERT L. PARADIS. 

